Pauling David
Chief Admin. Ofcr. & GC
PurchaseAlert
- Shares
- 12,504
- Price
- $0.80
- Value
- $9,993
SEC EDGAR · Forms 3/4/5Updated through Oct 30, 2026•37 filings
STRO
SUTRO BIOPHARMA, INC.
No net buying or selling imbalance over the last 3 months
No net buyers or sellers account for the net balance. There is no cluster of three distinct buyers within 30 days. We found no CEO/CFO purchases over 12 months.
How to read this signal
Only open-market P purchases and S sales count toward the signal. Vesting, options, taxes and gifts remain in the source data but do not trigger alerts. Rule 10b5-1 trades are shown as informational.
3-month balance
$0.00
0 buyers · 0 sellers
12-month purchases
$0.00
0 distinct insiders
12-month sales
$0.00
0 distinct insiders
Highlighted alerts
5
0 Rule 10b5-1 trades treated as informational
Buying cluster · 30 days
Fewer than three distinct buyers
CEO/CFO purchases · 12 months
No executive purchases found
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Form 4 raw → Raspberry
The value is in what we do not call a signal.
The SEC XML stores every transaction. Raspberry keeps that evidence, reads the footnotes and separates voluntary open-market activity from vesting, option exercises, gifts, tax withholding, stock purchase and dividend reinvestment plans and pre-programmed 10b5-1 trades.
77
Raw transactions
Everything returned by the filing
5
Voluntary view
P/S trades after deterministic checks
72
Administrative noise
Stored, never alerted
0
10b5-1
Shown as informational
SEC ownership XML facts
- Code
- F
- Shares
- 1,345
- Price
- $15.34
- Footnotes
- 4
The reported total includes 444 shares of Common Stock acquired by the reporting person in one or more transactions with the Issuer pursuant to its Employee Stock Purchase Plan, which transactions are exempt pursuant to Rules 16a3(f)(1)(i)(B) and 16b3(c). Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding and remittance obligations in connection with the net settlement of restricted stock units; does not represent a sale by the reporting person. Each RSU represents a contingent right to receive one (1) share of the Issuer's Common Stock upon settlement. The RSUs vested or vest as to 1/4 of the total award annually, with the first tranche vested on September 18, 2024, subject to the reporting person's continued service through each vesting date.
Recent transactions
Voluntary purchases and sales; administrative noise stays hidden.
Gerber Hans-Peter
CHIEF SCIENTIFIC OFFICER
PurchaseAlert
- Shares
- 17,000
- Price
- $0.80
- Value
- $13,607
Chung Jane
Chief Executive Officer
PurchaseAlert
- Shares
- 12,500
- Price
- $0.80
- Value
- $10,011
Chow Gregory K.
CFO
PurchaseAlert
- Shares
- 19,750
- Price
- $0.81
- Value
- $15,998
MATSUI CONNIE
Director
PurchaseAlert
- Shares
- 50,000
- Price
- $0.80
- Value
- $39,950
| Date | Insider | Transaction | Shares | Price | Value | Reading |
|---|---|---|---|---|---|---|
| Oct 15, 2025 | Pauling David Chief Admin. Ofcr. & GC | Purchase | 12,504 | $0.80 | $9,993 | |
| Oct 15, 2025 | Gerber Hans-Peter CHIEF SCIENTIFIC OFFICER | Purchase | 17,000 | $0.80 | $13,607 | |
| Oct 15, 2025 | Chung Jane Chief Executive Officer | Purchase | 12,500 | $0.80 | $10,011 | |
| Oct 15, 2025 | Chow Gregory K. CFO | Purchase | 19,750 | $0.81 | $15,998 | |
| Oct 15, 2025 | MATSUI CONNIE Director | Purchase | 50,000 | $0.80 | $39,950 |
“Alert” means a voluntary, unscheduled transaction according to the filing; it is not an investment recommendation. Official source: SEC EDGAR.